/*******************************************************************************
 * Copyright 2014 United States Government as represented by the
 * Administrator of the National Aeronautics and Space Administration.
 * All Rights Reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package gov.nasa.ensemble.common;

import static fj.data.Option.*;
import static gov.nasa.ensemble.common.extension.ClassRegistry.*;

import java.util.List;

import fj.data.Option;

public class LazyProperties {

	private final static List<ILazyPropertiesProvider> providers = createInstances(ILazyPropertiesProvider.class);

	public static Option<String> getProperty(String key) {
		for (final ILazyPropertiesProvider provider : providers) {
			final Option<String> result = provider.getProperty(key);
			if (result.isSome())
				return result;
		}
		return none();
	}
}
